epaulette shark (hemiscyllium ocellatum), a shark walking along the bottom with a black eye on its side in an aquarium

epaulette shark hemiscyllium ocellatum hemiscylliidae sea fish aquatic animal marine squalus elasmobranchii longtailed ocellatus chondrichthyes orectolobiformes saltwater fishtank walking aquarium water underwater tropical nature reef wildlife blue ocean beautiful life undersea fishes landscape sharks attack dangerous predator danger aggressive